I've worked with angular 1.x never made it to the upgrade of v2 and moved to React. I couldn't grok the two way data binding which seems odd let alone all the decorators / services / controllers patterns. In the end I had no clue what I was doing.

I do like to read up on these kind of things, but why should I be excited about Angular 13? Except from yay faster because of esbuild (like any other frontend framework).